/*
 * Copyright � 2002-2011 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

using System.Collections;
using System.Runtime.Serialization;
using Spring.Core.TypeResolution;
using Spring.Expressions.Parser.antlr.collections;

namespace Spring.Expressions;

/// <summary>
/// Represents parsed method node in the navigation expression.
/// </summary>
/// <author>Aleksandar Seovic</author>
[Serializable]
public class ArrayConstructorNode : NodeWithArguments
{
    private Type arrayType;

    /// <summary>
    /// Create a new instance
    /// </summary>
    public ArrayConstructorNode()
    {
    }

    /// <summary>
    /// Create a new instance from SerializationInfo
    /// </summary>
    protected ArrayConstructorNode(SerializationInfo info, StreamingContext context) : base(info, context)
    {
    }

    /// <summary>
    /// Creates new instance of the type defined by this node.
    /// </summary>
    /// <param name="context">Context to evaluate expressions against.</param>
    /// <param name="evalContext">Current expression evaluation context.</param>
    /// <returns>Node's value.</returns>
    protected override object Get(object context, EvaluationContext evalContext)
    {
        if (arrayType == null)
        {
            lock (this)
            {
                if (arrayType == null)
                {
                    arrayType = TypeResolutionUtils.ResolveType(getText());
                }
            }
        }

        AST rankRoot = getFirstChild();
        int dimensions = rankRoot.getNumberOfChildren();
        int[] ranks = new int[dimensions];
        if (dimensions > 0)
        {
            int i = 0;
            AST rankNode = rankRoot.getFirstChild();
            while (rankNode != null)
            {
                ranks[i++] = (int) GetValue((BaseNode) rankNode, context, evalContext);
                rankNode = rankNode.getNextSibling();
            }

            return Array.CreateInstance(arrayType, ranks);
        }
        else
        {
            AST valuesRoot = getFirstChild().getNextSibling();
            if (valuesRoot != null)
            {
                ArrayList values = (ArrayList) GetValue(((BaseNode) valuesRoot), context, evalContext);
                return values.ToArray(arrayType);
            }
        }

        throw new ArgumentException("You have to specify either rank or initializer for an array.");
    }
}
